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Main power supply flexible switching method in off-grid mode of micro-grid

A main power supply and micro-grid technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of gradual load transfer without consideration, large switching disturbance, switching failure, etc., to achieve flexible, smooth and seamless switching, and realize Intelligent adjustment, the effect of reducing impact

Active Publication Date: 2016-11-30
NANJING SIFANG EPOWER ELECTRIC POWER AUTOMATION +1
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Problems solved by technology

The patent "A Method for Main Control Power Supply Switching of Independently Operating Microgrid" proposes a main power switching method when the microgrid is running off-grid, but this patent mainly focuses on explaining the start-up conditions of the main power switching, and briefly introduces The switching steps of the rotating power supply to the main power supply, and the energy storage to the rotating power supply, but the gradual load transfer during the switching process is not considered in the patent, so there may be switching disturbances in the off-grid main power switching in large-scale microgrids Large risk of even switching failure, so it is not suitable for large-scale microgrid off-grid main power switching control

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  • Main power supply flexible switching method in off-grid mode of micro-grid
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  • Main power supply flexible switching method in off-grid mode of micro-grid

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Embodiment Construction

[0032] The invention provides a method for flexible switching of the main power supply under the off-grid mode of the microgrid, considering the smooth and seamless switching requirements during the switching process of the main power supply of the large-scale microgrid off-grid, and proposes a method based on gradual load transfer and energy storage PCS power gradual adjustment The flexible switching method, and the calculation method of the transfer control quantity in the related switching control is given. The following describes the inventive concept of the present invention in conjunction with the accompanying drawings.

[0033] The flexible switching method of the main power supply in the off-grid mode of the microgrid is as follows: figure 1 As shown, it mainly includes: the flexible switching of the rotating power supply to the main power supply of energy storage, and the flexible switching of the energy storage to the rotating power supply. At present, the rotating ...

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Abstract

The invention discloses a main power supply flexible switching method in an off-grid mode of a micro-grid, and belongs to the technical field of micro-grid operation control of power systems. Flexible smooth seamless switching between a rotary power supply main power supply operation mode and an energy storage main power supply operation mode in the off-grid mode of the micro-grid is realized by adopting a load progressive transfer-based flexible smooth switching method based on an energy storage PCS (Power Control System) droop or VSG (Virtual Synchronous Generator) technology.

Description

technical field [0001] The invention discloses a method for flexible switching of a main power supply in an off-grid mode of a microgrid, and belongs to the technical field of operation control of a microgrid in a power system. Background technique [0002] Due to the rapid development of power electronics and new energy technologies, microgrid technology has been applied more and more, and has become an important way to solve power supply in islands, remote high-altitude and other areas. As one of the important forms of distributed power generation, microgrid is an autonomous system capable of self-operation and management. The power grid has a flexible operation mode, which improves the stability and reliability of the system operation. [0003] Since there are two operation modes of grid-connected and off-grid in microgrid, the switch between grid-connected and off-grid operation modes has become an important research direction of microgrid operation control. The switch...

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/005H02J3/388H02J2203/20
Inventor 乔峰刘千杰余畅刘林吉小鹏卓玲吴恒陈玉峰
Owner NANJING SIFANG EPOWER ELECTRIC POWER AUTOMATION
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